William Waldegrave may refer to:
- William Waldegrave, 1st Baron Radstock (1753-1825), admiral
- William Waldegrave, 8th Earl Waldegrave (1788-1859), vice-admiral
- William Waldegrave, 9th Earl Waldegrave (1851-1930), politician
- William Waldegrave, Baron Waldegrave of North Hill (b. 1946), politician
- William Waldegrave, Viscount Chewton (1816-1854), soldier
- William Waldegrave, 10th Earl Waldegrave (d.1933)